We present the preliminary results of a narrow-band IR survey of QSO
and metal absorption-line fields for redshifted H\alpha/[NII]
emission from starforming galaxies at z\ge 1. As we reported in BAAS
188.21.02 this survey has already lead to the discovery of several
possible clusters.

To date, in fields targetted for objects at z>2, we have observed
more than 8 sqaure arcminutes using 1% filters in the Near IR Camera
on the Keck 10m telescope. The observations reach a limiting magnitude
of K=22, and would detect a limiting H\alpha flux of 3\times
10^-17 ergs/s/cm^2 (H_0=50, q_0=0.5). In these fields we
have detected 10--12 H\alpha candidates, down to an inferred
continuum luminosity of L* or below. In all but one object, the
detections have been in fields containing metal-absorption line
systems. The detected objects have shown compact, but resolved
morphologies, not exceeding FWHM=1^\prime \prime
(8kpc). The inferred Star Formation Rate of objects is typically 20
M_ødot/year, but some objects exceed 100 M_ødot/year.
Spectroscopic followup with the Low Resolution Imaging Spectrometer has
confirmed the redshift of our first detection. The high surface
density of detections (\sim 1.5/sq.arcminute) and high SFR suggests
clustering in fields containing metal-absorption line systems.

In fields targetted to z\sim 1, we have surveyed 50 square arcmintues
down to limiting magnitude of K=19, using the UCLA 2-channel IR Camera
on the Shane 3m telescope at Lick Observatory. To date, few emission line
galaxies have been detected. In some fields a 2--3\sigma excess of
galaxies is observed.

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